JP7116213B1 - Removal jig for 600mm x 800mm oblong recessed manhole covers on ship decks and/or cargo hold bottoms - Google Patents

Abstract

A handleless manhole cover (101) of 600 mm x 800 mm oblong recessed manhole placed on the deck of a ship or on the bottom of a cargo hold. A 600mm x 800mm oval recessed manhole cover removal tool is provided on ship decks and/or cargo hold bottoms with hooks that pass directly through square hole suspension loops 102a-102d. SOLUTION: In a removal jig for a 600 mm×800 mm oval embedded manhole cover on a ship deck and/or on the bottom of a cargo hold, a round steel grip part to be grasped by both hands or one hand of a worker, and a round steel grip part An equilateral triangular round steel shaft with the same diameter joined to the bottom of both ends, and a round steel hook with a diameter that can be directly inserted into the suspension loops arranged on the four sides of the manhole cover at the equilateral triangular tip of the round steel shaft. and have [Selection drawing] Fig. 1

Description

TECHNICAL FIELD The present invention relates to a manhole cover removing jig for removing a manhole cover in a ship in which a 600 mm×800 mm oval embedded manhole is installed on the deck and/or in the bottom of a cargo hold.

Regarding the opening and closing of the manhole cover, for example, the one disclosed in Japanese Utility Model Registration No. 3133294 and the one disclosed in Japanese Patent Application Laid-Open No. 2002-138504 are known.
The disclosure of utility model registration No. 3133294 relates to the device name "manhole lid opening tool", and "by making the structure of the auxiliary tool when opening the manhole lid, the structure is greatly simplified, the size is reduced, and the cost is reduced. Moreover, it is compact for storage and carrying to the site, and can be easily installed at the site. To provide a tool for opening a manhole cover having advantageous features, such as a tool for opening a manhole cover (see paragraph 0005 of the specification of the same publication), "It has a length that spans over the manhole cover, and legs on both sides and a through-hole opened in the tool body so as to be vertically movable and attached to the tool body, and is inserted into the key hole of the manhole cover and latched. a lid-lifting member having, on the lower end side, a hooking portion for lifting the lid, and on the upper end side, a lifting operation portion for lifting the hooking portion; By configuring with a long operating rod member for rotating or pulling up the lifting operation part (see the description of claim 1 of the utility model registration claim of the same publication), "an inspector etc. can open the manhole cover It is possible to mechanically help release the manhole cover from the manhole frame, which is sometimes hard work, and reduce the work labor.In addition, it is composed of a tool body, a lid lifting member, and an operation rod. , The structure is greatly simplified and smaller than the conventional lid opening tool.This can effectively reduce the cost, and it can be stored when not in use or brought to the site. It is possible to obtain compact storage at times.In addition, it is easy to set up on site.Furthermore, it is possible to use several types according to the adhesion situation of manhole covers." (Refer to Paragraph No. 0013 of the specification of the publication).

Further, the disclosure of the above-mentioned Japanese Unexamined Patent Application Publication No. 2002-138504 relates to the invention title "manhole cover opening/closing jig", and "provides a new jig for the operation of opening and closing the inner lid by human power (hand) in the past." In the problem to be solved by the invention (see paragraph No. 0008 of the specification of the same publication), ``a round steel with a handle attached to one end of a straight pipe and a substantially U-shaped shape at the other end (see the description of claim 1 of the same direction), "(1) When removing and moving the inner manhole cover, two people can can be lifted with both hands, and the load can be evened out, so there is no burden on the lower back.(2) The axis of the jig has a predetermined length and is inclined at an angle of 20° to the back side of the hook surface. (3) By using a jig, the inner lid can be kept at a certain distance from the body (legs) for safety. (4) It has a simple structure, can be constructed at a low cost, and is light in weight and easy to handle, so it is excellent in transportability and workability. See Paragraph Nos. 0022-0025 of the same publication).

However, the opening and closing of these manhole covers does not relate to manholes located on the deck of a ship or at the bottom of a cargo hold. In addition, manhole covers of 600mm x 800mm elliptical recessed manholes placed on ship decks and at the bottom of cargo holds weigh about 100kg and are extremely difficult to open, close and transport. However, unlike the manhole cover described above, the cover is not provided with a handle for hanging. This is because, if a manhole cover placed on the deck of this type of ship or at the bottom of a cargo hold is provided with a handle for suspension, there is a risk that water will accumulate in the handle and the cargo to be loaded will be submerged. This is because there is a concern that the manhole may trip over the manhole, or that a bulldozer or the like for cargo handling may get in the way when it passes over the manhole and catch a nail.

5(A) and (B) are diagrams showing an outline of the manhole cover on which the removal jig for the 600 mm×800 mm oblong embedded manhole cover on the ship deck and/or the bottom of the cargo hold according to the present invention is based. FIG. 5(A) is a plan view of the manhole cover, and FIG. 5(B) is a schematic sectional view of one of the loops arranged at the four ends. In FIG. 5A, reference numeral 101 denotes a manhole cover, 102a to 102d are loops for suspension arranged on the four sides of the manhole cover 101, 103 is the upper surface of the manhole cover, 104 is the manhole cover base, and 105 is the manhole cover base. , a manhole frame, 106 is a coaming, 109 is a ship deck or cargo hold bottom, and 110 is a manhole packing. In FIG. 5(B), one of the loops 102a to 102d is denoted by reference numeral 102, and the remaining members are denoted by the same reference numerals as in FIG. 5(A).

As shown in FIG. 5B, the loops 102a to 102d arranged at the four ends of the manhole cover 101 described above are rectangular holes with a width of 30 mm and an inner height of 9 mm.
Therefore, when opening and closing a manhole cover that does not have a handle for hanging as described above, each time the manhole cover is removed from a ship deck or a cargo hold bottom, the 102a arranged at the four ends of the manhole cover 101 A cord (wire) of a predetermined diameter is passed between the loops of 102d to 102d, and an operator lifts the cord to remove the manhole cover.

FIG. 6 is a schematic diagram showing a situation in which a wire having a predetermined diameter is passed between the loops 102a and 102b and between the loops 102c and 102d arranged at the four ends in order to lift the manhole cover 101. FIG. 7 is a schematic diagram showing a situation in which a worker lifts the manhole cover 101 by grasping this number line. 6 and 7, reference numeral 101 is the same manhole cover as shown in FIGS. Wires 108a and 108b of a predetermined diameter passed between 102d are workers who hold the wires 107a and 107b and lift the manhole cover 101 (in FIGS. 5 to 7, reference numerals indicate prior art. In order to clarify this, the applicant of the present application indicated it in three digits.)

However, as shown in Figures 5(A), (B), Figures 6 and 7, since it interferes with passage on the ship deck and loading/unloading into the cargo hold, the oval-shaped embedment on the ship deck and the bottom of the cargo hold The wire 107a, 107b cannot be permanently attached to the manhole cover 101 of the manhole. Therefore, as shown in FIGS. 6 and 7, each time the manhole cover 101 is removed, it is necessary to attach wire 107a and 107b to the loops 102a to 102d at the four ends. When attaching the wires 107a and 107b, a tool (not shown) is required to cut and fix the wires 107a and 107b. Therefore, skilled workers 108a and 108b are required for the installation work, and in addition, installation of the wires 107a and 107b requires a work time of at least about 10 minutes per place. Furthermore, after the work of removing the manhole cover 101 is completed, the installed number lines 107a and 107b are cut off so as not to interfere with deck traffic and cargo handling. It takes work time to remove the manhole cover 101 of the 600 mm x 800 mm oblong embedded manhole located in the , which causes deterioration of work efficiency.

Utility Model Registration No. 3133294 JP-A-2002-138504

Therefore, the inventors of the present application have proposed a 600 mm × 800 mm elliptical embedded manhole cover 101 having no handle, which is placed on the deck of a ship or at the bottom of a cargo hold. Provide a 600mm x 800mm oval recessed manhole cover removal tool on ship deck and/or cargo hold bottom with hooks that pass directly through hanging loops 102a-102d consisting of 9mm inner height square holes. The purpose is to

In order to solve the above problems, the invention according to claim 1 of the present application provides a removal jig for a 600 mm x 800 mm oval embedded manhole cover on a ship deck and / or on the bottom of a cargo hold. A round steel grip part to be grasped, a round steel shaft part of the same diameter, which is joined to the lower end of the round steel grip part, and an equilateral triangular shape with the round steel grip, and 600 mm × 800 mm at the equilateral triangular tip of the round steel shaft part Suspension loops placed diagonally at the four ends of an oval embedded manhole cover. It has a diameter that can be directly inserted horizontally at the horizontal position, and the tip direction of the hook is three-dimensional with the round steel grip. and a round steel hook that is in the same direction.
Further, the invention according to claim 2 of the present application is a jig for removing a 600 mm × 800 mm oblong embedded manhole cover on the ship deck and / or on the bottom of the cargo hold according to claim 1, wherein the jig according to claim 1 It is a T-shaped shaft that is joined to the lower ends of the round steel grip portion and that is joined orthogonally to the center of the round steel grip portion instead of the equilateral triangular round steel shaft portion of the same diameter formed together with the round steel grip. It is characterized by
Furthermore, the invention according to claim 3 of the present application is a jig for removing a 600 mm × 800 mm oval embedded manhole cover on a ship deck and / or on the bottom of a cargo hold according to claim 1, wherein the round steel hook part The center of the hook at the lower end position is located below the tip of the round steel shaft portion, and the round steel hook portion 4 as a whole is bent to the opposite side of the hook tip 4b with an R of 100 mm, and the height of the hook tip is from the lowest end of the hook center. It is characterized by a semicircular round steel hook with a height of 15 mm and a width equal to the front and rear.

For removing the handleless manhole cover 101 of the 600mm x 800mm oblong recessed manhole placed on the deck of a ship or on the bottom of a cargo hold, the above structure on the ship deck and/or the bottom of the cargo hold. 600mm x 800mm elliptical embedded manhole cover removal jig has the following advantages.
(1) Since it is not necessary to attach a grid wire to all manhole covers to be removed, the work time can be greatly reduced.
(2) Attaching the wire requires tools, time, and skill, but anyone can easily remove the manhole cover in a few seconds by simply hooking the hook of the jig to the loop of the manhole cover. Anyone can do it easily and in a short time.
(3) The length of the grip is set so that it is easy to hold with both hands or one hand. For example, four jigs and four workers (holding the jig with both hands), the operator can select the method that is most convenient for the workers according to the location and situation.
(4) Since the jig can be easily carried, one set can be used for all 600 mm x 800 mm oval embedded manhole covers to be removed.
(5) A 600 mm x 800 mm oval embedded manhole cover with a weight of about 100 kg can be easily opened, closed, and transported.

FIG. 1 shows a 600 mm x 600 mm x 600 mm x 800 mm oval embedded manhole cover on the deck and/or the bottom of the cargo hold according to the present invention. 1 is a schematic diagram of Example 1 of a removal jig for an 800 mm oblong embedded manhole cover; FIG. FIG. 2 shows that the hook tip 4b of the removal jig 1 for the 600 mm × 800 mm oval embedded manhole cover on the ship deck and/or the bottom of the cargo hold according to the first embodiment is attached to each loop 102a to 102d of the manhole cover 101. It is the figure which showed the state which inserts directly and removes by two workers. FIG. 3 shows that the hook tip 4b of the removal jig 1 for the 600 mm × 800 mm oval embedded manhole cover on the ship deck and/or the bottom of the cargo hold according to the first embodiment is attached to each loop 102a to 102d of the manhole cover 101. It is the figure which showed the state which inserts directly and removes by four workers. FIG. 4 is a diagram schematically showing a removal jig for a 600 mm×800 mm oval embedded manhole cover on a ship deck and/or on the bottom of a cargo hold according to the second embodiment. 5(A) and (B) are diagrams showing an outline of the manhole cover on which the removal jig for the 600 mm×800 mm oblong embedded manhole cover on the ship deck and/or the bottom of the cargo hold according to the present invention is based. FIG. 5(A) is a plan view of the manhole cover, and FIG. 5(B) is a schematic sectional view of one of the loops arranged at the four ends. FIG. 6 is a schematic diagram showing how to lift the manhole cover 101 by passing a wire with a predetermined diameter between the loops 102a and 102b and between the loops 102c and 102d. In FIG. 7, in order to lift the manhole cover 101, a wire with a predetermined diameter is passed between the loops 102a and 102b and between the loops 102c and 102d arranged at the four ends, and the manhole cover is lifted by grasping the wire. 101 is a schematic diagram showing a situation in which an operator lifts 101; FIG.

An embodiment for carrying out a removal jig for a 600 mm×800 mm elliptical embedded manhole cover on a ship deck and/or on the bottom of a cargo hold according to the present invention will be described in detail with reference to the drawings.

FIG. 1 shows a 600 mm x 600 mm x 600 mm x 800 mm oval embedded manhole cover on the deck and/or the bottom of the cargo hold according to the present invention. 1 is a schematic diagram of Example 1 of a removal jig for an 800 mm oblong embedded manhole cover; FIG.
In FIG. 1, reference numeral 1 denotes a jig for removing a 600 mm × 800 mm oblong embedded manhole cover on a ship deck and/or cargo hold bottom according to the first embodiment, 2 is its grip portion, 3a, 3b is the shaft portion, 3c is the tip of the shaft portions 2a and 2b, 4 is the hook portion, 4a is the center of the hook, 4b is the tip of the hook, and 5a, 5b and 5c are weld joints.

As is clear from FIG. 1, the removal jig 1 for the 600 mm×800 mm elliptical embedded manhole cover on the ship deck and/or on the bottom of the cargo hold according to the first embodiment is a 250 mm long grip made of 12 mmφ round steel. 12 mmφ round steels are welded to the weld joints 5a and 5b so as to have a substantially equilateral triangular shape and a total length of 155 mm below both ends of the portion 2, and to the tip portions 3c of the shaft portions 3a and 3b. A hook portion 4 made of round steel of 6 mmφ and having a length of approximately 100 mm and having a hook center 4a and a hook tip 4b at the tip thereof is welded and joined at a weld joint portion 5c.

Further, since the hook tip 4b of the hook portion 4 of the removal jig 1 for the 600 mm×800 mm oval embedded manhole cover on the ship deck and/or the bottom of the cargo hold according to the first embodiment is 6 mmφ, 600 mm× The size and shape that can be directly inserted into the hanging loops 102a to 102d of the 800mm oblong embedded manhole cover 101, that is, the center of the hook has a bend of R15mm with a width of 15mm in the front and rear at the lowest end of the hook. The hook portion 4 as a whole is bent to the opposite side of the hook tip 4b with an R of 100 mm so that it is positioned at the center of the shafts 2a and 2b. It presents a hook (key) with a circular shape.
The hook direction of the hook tip 4b is the same as that of the grip portion 2 three-dimensionally.

In addition, the length of the grip portion 2 is such that the operator can easily hold it with both hands or one hand. The shape is such that the grip part 2 does not easily hit other places and does not interfere with the work.
As is clear from FIG. 1, since the direction of the hook tip 4b is arranged parallel to the grip portion 2, by moving the hook tip 4b laterally to the loop 102 while gripping the grip portion 2, , the hook tip 4b can be easily inserted into the loop 102, and even an inexperienced person can remove the manhole cover 101 very easily.

2 and 3 show that the hook tip 4b of the removal jig 1 for the 600 mm×800 mm oval embedded manhole cover on the ship deck and/or the bottom of the cargo hold according to the first embodiment is attached to each loop 102a of the manhole cover 101. FIGS. 102d and removed by two or four workers. That is, as shown in FIGS. 2 and 3, prepare two or four removal jigs 1 for the 600 mm×800 mm oblong embedded manhole cover on the ship deck and/or the bottom of the cargo hold according to the first embodiment. Then, the hook tip 4b is directly inserted into two or all of the four loops 102a to 102d on the manhole cover 101 and hooked, and the manhole cover 101 is lifted by holding the grip part 2 with both hands or one hand. is to be removed.
By using the removal jig 1 for the 600 mm × 800 mm oblong embedded manhole cover on the ship deck and / or on the bottom of the cargo hold according to the first embodiment, attaching the grid wire to the manhole cover that has been required so far is not required, and anyone can easily remove the manhole cover in a few seconds.

Considering the size and ease of holding of the operator's hand, a removal jig for a 600 mm x 800 mm oblong embedded manhole cover on the ship deck and/or the bottom of the cargo hold according to a modified embodiment 2 will be described.
FIG. 4 is a diagram schematically showing a removal jig for a 600 mm×800 mm oval embedded manhole cover on a ship deck and/or on the bottom of a cargo hold according to the second embodiment. In FIG. 4, reference numeral 10 is a removal jig for a 600 mm × 800 mm oblong embedded manhole cover on the ship deck and / or the bottom of the cargo hold according to the second embodiment, 12 is the grip portion, and 13 is the shaft portion. , 14 is the hook portion, 14a is the center of the hook, and 14b is the tip of the hook.

The removal jig 10 for the 600 mm × 800 mm oblong embedded manhole cover on the ship deck and/or the bottom of the cargo hold according to the second embodiment shown in FIG. Similar to the 600 mm × 800 mm elliptical embedded manhole cover removal jig 1 of Kurabotoko, a similar T-shaped shape is placed in the center of a 150 mm long grip part 12 made of a round steel of 12 mm diameter. A 200 mm long round steel of 12 mmφ is welded to the weld joint 15a, and a hook portion 14 having a hook center 14a and a hook tip 14b at the tip of the shaft portion 13 is made of a round steel of 6 mmφ and has a length of approximately 100 mm. are welded together at the welded joint 15b.

That is, the removal jig 10 for the 600 mm × 800 mm oval embedded manhole cover on the ship deck and/or the cargo hold bottom according to the second embodiment is the same as that on the ship deck and/or the cargo hold bottom according to the first embodiment. The 600 mm × 800 mm oval embedded manhole cover removal jig 1 exhibits an equilateral triangle shape with a grip portion 2 and shaft portions 3a and 3b, and has a total length of 155 mm. The only difference is that it is a manhole cover removal jig, and the direction of the hook and the arrangement of the grip part in the closed mouth are the same, so detailed explanations of how to use it and the functions that work when using it are omitted. do.

INDUSTRIAL APPLICABILITY The present invention is used as a manhole cover removing jig for removing a manhole cover in a ship in which a 600 mm×800 mm oval embedded manhole is installed on the deck and/or in the bottom of a cargo hold.

1 Removal jig for 600 mm × 800 mm oval embedded manhole cover on ship deck and/or bottom of cargo hold according to Example 1 2 Grip parts 3a, 3b Shaft part 3c Tip part 4 Hook part 4a Hook center 4b Hook tip 5a, 5b, 5c, welded joints 10 removal jig for 600 mm x 800 mm oval embedded manhole cover on ship deck and/or bottom of cargo hold according to Example 2 12 grip 13 shaft 14 hook 14a hook Center 14b Hook tip 15a, 15b Welding joint 101 Manhole cover 102a-102d Loop 103 Manhole cover upper surface 104 Manhole cover base 105 Manhole frame 106 Combing 107a, 107b No. wire (wire)
108a, 108b, 108c, 108d Worker 109 Ship deck or cargo hold bottom 110 Manhole packing

Claims (3)

A round steel grip portion held by both hands or one hand of the operator,
a round steel shaft of the same diameter, which is joined to the lower ends of the round steel grip and has an equilateral triangular shape with the round steel grip;
600mm x 800mm oval embedded manhole cover diagonally arranged at the four ends of the equilateral triangle tip of the round steel shaft. A round steel hook whose tip direction is three-dimensionally the same direction as the round steel grip part,
A removal jig for a 600mm x 800mm oval recessed manhole cover on a ship deck and/or cargo hold bottom, characterized in that it comprises: It is joined to the lower ends of the round steel grip portion according to claim 1, and instead of the equilateral triangular round steel shaft portion of the same diameter formed together with the round steel grip portion, it is joined orthogonally to the center of the round steel grip portion. 600 mm×800 mm oval embedded manhole cover removal tool on ship deck and/or cargo hold bottom according to claim 1, characterized in that it is a T-shaped shaft. The hook center at the lowest end position of the round steel hook portion is positioned below the tip of the round steel shaft portion, and the round steel hook portion 4 as a whole is bent to the opposite side of the hook tip 4b with an R of 100 mm, and the height of the hook tip is 600 mm x 800 mm elliptical type on ship deck and/or cargo hold bottom according to claim 1, characterized in that it is a semicircular round steel hook with a height of 15 mm from the lowest end of the center of the hook and has an equal width front and back. Removal jig for embedded manhole covers.

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